| 准噶尔盆地西北缘三叠系地层格架的建立——来自岩性、地震、测井及地化方面的证据 |
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| 关键词:Junggar Karamay Triassic strata boundary logging seismic survey element |
| 基金项目:国家科技重大专项“全国油气基础地质研究与编图”(编号: 2011ZX05043-005);中国地质调查局基础地质综合研究项目“西太平洋大陆边缘深部过程与成矿作用研究”(编号: 1212011120181) |
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| The Construction of Triassic Stratigraphic Framework of the Northwest Margin of Junggar Basin Based on the Evidence from Lithology, Logging, Seismic Survey and Geochemistry |
| Triassic strata on the northwest margin of Junggar Basin constitute one of the most significant oil and gas strata in China. However, there has long existed much controversy concerning the development state of the strata, especially the subdivision of inner small strata and the existence or nonexistence of the unconformity. In combination with previous results, lithology, logging and seismic data, on the basis of outcrop research, and according to the field investigation along five profiles of Shendigou–Dazhuluogou, Huayuangou, Heiyoushangou, Tuzigou, and Shuikugou, the authors identified the marker beds and boundaries of J/T, T/C, T3/T2, T2k2/T2k1 and S6/S7. It is held that there is no hiatus in Triassic, and S2 and S3 can be distinguished according to outcrop characteristics. On such a basis, the Triassic stratigraphic framework is set up. Furthermore, the Lower Triassic is subdivided into 3 members and 6 sand groups, the Upper Triassic is subdivided into 3 members and 7 sand groups, and the Middle Triassic is further subdivided into 2 members, 7 sand groups and 14 small strata by analyzing the logging data. Also, the strata is partly verified according to the method of elementary stratigraphy. |
| HE Miao,LI Ting-dong,ZHANG Li-wei,YAO Jian-xin,YOU Guo-qing,GENG Shu-fang,WU Xiao-jun.2015.The Construction of Triassic Stratigraphic Framework of the Northwest Margin of Junggar Basin Based on the Evidence from Lithology, Logging, Seismic Survey and Geochemistry[J].Acta Geoscientica Sinica,36(2):151-160. |
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